Argentinean Myotis (Chiroptera, Vespertilionidae), including the description of a new species from the Yungas Author Novaes, Roberto Leonan M. https://orcid.org/0000-0003-1657-2807 Fundacao Oswaldo Cruz, Fiocruz Mata Atlantica, 22713 - 375, Rio de Janeiro, RJ, Brazil robertoleonan@gmail.com Author Claudio, Vinicius C. https://orcid.org/0000-0002-3438-911X Universidade Federal do Rio de Janeiro, Instituto de Biologia, Programa de Pos-Graduacao em Biodiversidade e Biologia Evolutiva, 21941 - 902, Rio de Janeiro, RJ, Brazil Author Diaz, M. Monica https://orcid.org/0000-0001-9519-6461 Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Universidad Nacional de Tucuman, Facultad de Ciencias Naturales, Instituto de Investigaciones de Biodiversidad Argentina; and Fundacion Miguel Lillo 251, 4000, Tucuman, Argentina Author Wilson, Don E. https://orcid.org/0000-0003-4228-5334 Smithsonian Institution, National Museum of Natural History, 20560, Washington, DC, USA Author Weksler, Marcelo Museu Nacional da Universidade Federal do Rio de Janeiro, Departamento de Vertebrados, 20940 - 040, Rio de Janeio, RJ, Brazil Author Moratelli, Ricardo https://orcid.org/0000-0003-0942-6633 Fundacao Oswaldo Cruz, Fiocruz Mata Atlantica, 22713 - 375, Rio de Janeiro, RJ, Brazil text Vertebrate Zoology 2022 2022-12-14 72 1187 1216 http://dx.doi.org/10.3897/vz.72.e90958 journal article http://dx.doi.org/10.3897/vz.72.e90958 2625-8498-72-1187 F856EE991746498CBA152D34A3EEE979 DDDD7D4212E25E21A162EF3D08B19D0D Myotis levis (I. Geoffroy, 1824) Comments. Medium-sized species (FA 36.5-40.1 mm, body mass 6-8 g; Table 5 , Fig. 8 ), with silky, moderately long fur (LDH 6-8 mm, LVH 4-7 mm). Ears comparatively long (length 16-19 mm). Dorsal fur bicolored, with blackish bases (2/3 hair length) and the tips (1/3 hair length) ranging from Mummy Brown to Bister. The ventral fur is strongly bicolored, with blackish bases (1/2 hair length) and tips (1/2 hair length) Ivory Yellow or Drab Gray. Membranes and ears Mummy Brown. Legs and dorsal surface of uropatagium naked. A fringe of hairs along the trailing edge of the uropatagium present. The plagiopatagium attached to feet on the level of the base of the toes by a wide band of membrane. Skull medium to large in size (GLS 14.4-15.5 mm, BCB 6.8-7.5 mm), and the rostrum is comparatively long and broad. The P3 is approximately the same size as P2, or slightly smaller, and usually aligned in the toothrow and visible in labial view. Sagittal crest absent or very low; lambdoidal crests usually present and ranging from low to medium. Parietals incline subtly forward to the frontal bone; occipital region rounded and projecting beyond the occipital condyle limits; braincase elongated in dorsal view; the postorbital and interorbital constrictions are comparatively narrow. Table 5. External and craniodental measurements of Argentinean populations of Myotis levis , M. chiloensis , and M. oxyotus , including morphometric variation and number of samples (N). The measurements are in millimeters. Acronyms and descriptions are available in Table 1 .

Measurements	Myotis levis	Myotis chiloensis	Myotis oxyotus
	mean (min-max) N	mean (min-max) N	CML 10860
FA	38.6 (36.6-40.1) 5	38.5 (37.0-41.2) 30	40.9
EL	17.0 (16.0-19.0) 5	15.0 (14.0-16.0) 22	19.0
Body mass	7.0 (6.0-8.0) 4	7.5 (5.5-9.5) 20	4.0
LDF	7.0 (6.0-8.0) 5	7.0 (6.0-8.5) 20	9.5
LVF	6.0 (4.5-7.0) 5	6.0 (5.0-7.5) 20	7.5
GLS	15.1 (14.4-15.5) 5	14.7 (13.8-15.3) 30	14.7
CCL	13.2 (12.7-13.5) 5	13.0 (12.4-13.7) 30	12.8
CBL	13.9 (13.5-14.2) 5	13.7 (13.3-14.4) 30	13.5
CIL	14.1 (13.6-14.5) 5	14.0 (13.6-14.6) 30	13.9
BAL	12.7 (12.1-13.2) 5	12.6 (12.1-13.1) 30	12.5
ZYG	9.0 (8.5-9.3) 4	-	8.7
MAB	7.6 (7.2-7.8) 5	7.6 (7.3-7.8) 30	7.1
BCB	7.1 (6.8-7.5) 5	7.0 (6.4-7.5) 30	6.9
POB	3.7 (3.5-3.8) 5	3.8 (3.5-4.0) 30	3.8
IOB	4.7 (4.3-4.5) 5	4.7 (4.6-5.0) 30	4.9
BAC	3.7 (3.5-3.9) 5	3.8 (3.6-4.0) 30	3.5
BAM	5.8 (5.6-6.0) 5	5.8 (5.4-6.1) 30	5.5
MTL	5.5 (5.4-5.6) 5	5.7 (5.5-5.8) 30	5.6
M1-3	3.2 (3.1-3.2) 5	3.2 (3.1-3.3) 30	3.6
MAN	6.0 (5.8-6.1) 4	6.0 (5.6-6.2) 30	5.8
MAL	10.6 (10.0-10.8) 4	10.6 (10.1-11.1) 30	11.0

Figure 8. Adult male of Myotis levis (CML 4127) from Buenos Aires, Argentina. This species occurs from Southeastern Brazil southward to Uruguay, Paraguay, and eastern Argentina, from ombrophilous Atlantic Forest to Pampa grasslands ( LaVal 1973 ; Wilson 2008 ; Moratelli et al. 2019a ). In Argentina it is present in the Provinces of Buenos Aires, Corrientes, Entre Rios , Misiones, and Santa Fe, occurring in scrubland savannas in an altitudinal range from sea level to 200 m ( Barquez and Diaz 2020 ).